Blende8 : here are my settings...
- K10, 18-55 @ 55mm
- Subject : a light bulb, 2m aways, on a gray or dark background (used a ceiling light at work for the test today)
- Matrix metering (!)
- AF on Select, center point
Custom settings (those being relevant IMO):
- Program line = Depth
- Meter Operating time = 10s
- AE-L with AF locked = On
-
Link AF point and AE = On
- Auto EV comp = Off
- AF button = cancel AF
- AF by press halfway = On
- Superimpose AF Area = On
Test done
- focus on the light bulb (should roughly fill the Spot brackets);
- release the shutter button (you can notice the metering stays active for the selected duration in "Meter Operating time");
- note the exposure values;
- Half-press (still with the light bulb in the center area) and note the exposure values;
- Release.
Another remark : by disabling "AE-L with AF locked" (or enabling it and pressing the AE-L button while half-pressing), if you move the view around, you'll notice that it's behaving a lot like a spot metering .
Which is fine by me, as if you point the camera straight at a small light source dead-center, then you surely want to properly expose this light source. But then, why does it not work this way when using peripheral focus points with "Link AF point and AE" enabled???
Originally posted by blende8 The metering starts when you half press, not before.
You can only get the metering this way and pressing again changes nothing with regard to the metering, but only AF.
In fact, the metering is still active for a given time after releasing the button... And from what I saw, it's in fact the CW metering, and not the matrix metering, that is displayed during this "Meter Operating time" duration (when it's active but you don't maintain half-pressure).